Acid Gas Separation Membrane with Segmented Hydrophobic Layers

The membrane is divided into multiple functional layers: a first layer (hydrophobic porous layer) to suppress water vapor permeation, a second layer (facilitated transport layer with hydrophilic resin and acid gas carrier) to enable acid gas permeation, and a third layer (hydrophobic porous layer) to further suppress water vapor permeation. This segmentation allows each layer to perform its specific function, resolving the contradiction between acid gas permeability and water vapor suppression.

Different layers of the membrane have different local properties: the first and third layers are hydrophobic to repel water vapor, while the second layer is hydrophilic to facilitate acid gas transport. This local quality differentiation enables the membrane to simultaneously achieve high acid gas permeability and low water vapor permeation, maintaining dew point for heat recovery.

The membrane is segmented into hydrophobic layers (first and third layers) for water vapor suppression and a hydrophilic facilitated transport layer (second layer) for acid gas permeation. This segmentation ensures that water vapor suppression does not compromise acid gas permeability, as each layer is optimized for its specific function.

The membrane uses a composite structure combining hydrophobic porous materials (for water vapor suppression) with hydrophilic resin and acid gas carrier (for acid gas permeation). This composite material approach allows the membrane to simultaneously achieve both functions: suppressing water vapor to maintain dew point while maintaining high acid gas permeability through the facilitated transport mechanism.